#645C00
Closest named color: Greeny Brown (#696006). oklch(46.8% 0.099 103.7), rgb(100, 92, 0).
Aa
White text reads best on this color (6.83:1).
About this color
#645C00 is a medium-dark, moderately saturated brown. In OKLCH its lightness is 47%, its chroma 0.099 and its hue 104°. Its hue sits on the warm side of the wheel. The nearest named color is Greeny Brown (#696006), ΔE 0.015 away. White text reads best on it, at 6.83:1.
| Hue family | Browns |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.099) |
| Temperature | warm |
| Nearest name | Greeny Brown (#696006) |
| Black text | 3.07:1 |
| White text | 6.83:1 |
Values
| HEX | #645C00 |
| RGB | rgb(100, 92, 0) |
| HSL | hsl(55, 100%, 20%) |
| OKLCH | oklch(46.8% 0.099 103.7) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #645C00 | 6.83:1 | AA | Lc -88.4 | Fine for body text |
| Black text on #645C00 | 3.07:1 | AA large text | Lc 20.6 | Dividers and decoration only |
| #645C00 text on white | 6.83:1 | AA | Lc 83.4 | Fine for body text |
| #645C00 text on black | 3.07:1 | AA large text | Lc -18.5 | Dividers and decoration only |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 700.
-
Step 50
50
#F6F6F1
oklch(97.2% 0.007 106.5)
-
Step 100
100
#EBEAE0
oklch(93.5% 0.013 102)
-
Step 200
200
#DCDAC7
oklch(88.5% 0.026 102)
-
Step 300
300
#C5C39F
oklch(80.9% 0.049 104.8)
-
Step 400
400
#A8A36B
oklch(70.6% 0.076 103.8)
-
Step 500
500
#948C41
oklch(63.1% 0.097 103.2)
-
Step 600
600
#7E761D
oklch(55.7% 0.106 104.1)
-
Step 700
700 (this color)
#645C00
oklch(46.8% 0.099 103.7)
-
Step 800
800
#575110
oklch(42.8% 0.082 103.9)
-
Step 900
900
#474316
oklch(37.7% 0.064 104.2)
-
Step 950
950
#2A270E
oklch(26.9% 0.04 102.5)
#645C00 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #665900 | 0.009 |
| Deuteranopia (no green cones) | #685C0A | 0.009 |
| Tritanopia (no blue cones) | #6D544D | 0.091 |
| Achromatopsia (no color) | #5B5B5B | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #645C00
#645C00
oklch(46.8% 0.099 103.7)
- #54518F
#54518F
oklch(46.7% 0.099 284.1)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #645C00, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greeny Brown #696006 ΔE 0.015
- Olive Brown #645403 ΔE 0.024
- Mud #735C12 ΔE 0.029
- Mud Green #606602 ΔE 0.029
- Camo Green #526525 ΔE 0.035
- Army Green #4B5D16 ΔE 0.038
- Camouflage Green #4B6113 ΔE 0.038
- Dark Olive Green #556B2F ΔE 0.047
Use #645C00 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.